From mboxrd@z Thu Jan 1 00:00:00 1970 From: George Dunlap Subject: Re: Notes on stubdoms and latency on ARM Date: Tue, 23 May 2017 10:08:33 +0100 Message-ID: <0ca190f0-772e-936e-4b14-c84dd03580df@citrix.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Volodymyr Babchuk , Stefano Stabellini Cc: Artem_Mygaiev@epam.com, Dario Faggioli , xen-devel@lists.xensource.com, Andrii Anisov , Julien Grall List-Id: xen-devel@lists.xenproject.org T24gMTkvMDUvMTcgMjA6NDUsIFZvbG9keW15ciBCYWJjaHVrIHdyb3RlOgo+IEhpIFN0ZWZhbm8s Cj4gCj4gT24gMTggTWF5IDIwMTcgYXQgMjI6MDAsIFN0ZWZhbm8gU3RhYmVsbGluaSA8c3N0YWJl bGxpbmlAa2VybmVsLm9yZz4gd3JvdGU6Cj4gCj4+IERlc2NyaXB0aW9uIG9mIHRoZSBwcm9ibGVt OiBuZWVkIGZvciBhIHBsYWNlIHRvIHJ1biBlbXVsYXRvcnMgYW5kCj4+IG1lZGlhdG9ycyBvdXRz aWRlIG9mIFhlbiwgd2l0aCBsb3cgbGF0ZW5jeS4KPj4KPj4gRXhwbGFuYXRpb24gb2Ygd2hhdCBF TDAgYXBwcyBhcmUuIFdoYXQgc2hvdWxkIGJlIHRoZWlyIGludGVyZmFjZSB3aXRoCj4+IFhlbj8g Q291bGQgdGhlIGludGVyZmFjZSBiZSB0aGUgcmVndWxhciBoeXBlcmNhbGwgaW50ZXJmYWNlPyBJ biB0aGF0Cj4+IGNhc2UsIHdoYXQncyB0aGUgYmVuZWZpdCBjb21wYXJlZCB0byBzdHViZG9tcz8K PiBJIGltYWdpbmVkIHRoaXMgYXMgc2VwYXJhdGUgc3lzY2FsbCBpbnRlcmZhY2UgKHdpdGggZmlu ZXIgcG9saWN5Cj4gcnVsZXMpLiBCdXQgdGhpcyBjYW4gYmUgZGlzY3Vzc2VkLCBvZiBjb3Vyc2Uu CgpJIHRoaW5rIHRoYXQncyBhIG5hdHVyYWwgcGxhY2UgdG8gc3RhcnQuICBCdXQgdGhlbiB5b3Ug c3RhcnQgdGhpbmtpbmcKYWJvdXQgdGhlIGRldGFpbHM6IHRoaXMgdGhpbmcgbmVlZHMgdG8gYmUg YWJsZSB0byBtYW5hZ2UgaXRzIG93biBhZGRyZXNzCnNwYWNlLCBzZW5kIGFuZCByZWNlaXZlIGV2 ZW50IGNoYW5uZWxzIC8gaW50ZXJydXB0cywgJmMgJmMgLS0gYW5kIGl0CmFjdHVhbGx5IGVuZHMg dXAgbG9va2luZyBleGFjdGx5IGxpa2UgYSBzdWJzZXQgb2Ygd2hhdCBhIHN0dWJkb21haW4gY2Fu CmFscmVhZHkgZG8uCgpJbiB3aGljaCBjYXNlIC0tIHdoeSBpbnZlbnQgYSBuZXcgaW50ZXJmYWNl LCBpbnN0ZWFkIG9mIGp1c3QgcmV1c2luZyB0aGUKZXhpc3Rpbmcgb25lPwoKPj4gVGhlIHByb2Js ZW0gd2l0aCBzdHViZG9tcyBpcyBsYXRlbmN5IGFuZCBzY2hlZHVsaW5nLiBJdCBpcyBub3QKPj4g ZGV0ZXJtaW5pc3RpYy4gV2UgY291bGQgZWFzaWx5IGltcHJvdmUgdGhlIG51bGwgc2NoZWR1bGVy IHRvIGludHJvZHVjZQo+PiBzb21lIHNvcnQgb2Ygbm9uLXByZWVtcHRpdmUgc2NoZWR1bGluZyBv ZiBzdHViZG9tcyBvbiB0aGUgc2FtZSBwY3B1cyBvZgo+PiB0aGUgZ3Vlc3QgdmNwdXMuIEl0IHdv dWxkIHN0aWxsIHJlcXVpcmUgbWFudWFsbHkgcGlubmluZyB2Y3B1cyB0byBwY3B1cy4KPiBJIHNl ZSBjb3VwbGUgb2Ygb3RoZXIgcHJvYmxlbXMgd2l0aCBzdHViZG9tcy4gRm9yIGV4YW1wbGUsIHdl IG5lZWQKPiBtZWNoYW5pc20gdG8gbG9hZCBtZWRpYXRvciBzdHViZG9tIGJlZm9yZSBkb20wLgoK VGhlcmUgYXJlIGEgY291cGxlIG9mIG9wdGlvbnMgaGVyZS4gIFlvdSBjb3VsZCBkbyBzb21ldGhp bmcgbGlrZSB0aGUKWG9hciBwcm9qZWN0IFsxXSBkaWQsIGFuZCBoYXZlIFhlbiBib290IGEgc3Bl Y2lhbC1wdXJwb3NlICJzeXN0ZW0KYnVpbGRlciIgZG9tYWluLCB3aGljaCB3b3VsZCBzdGFydCBi b3RoIHRoZSBtZWRpYXRvciBhbmQgdGhlbiBhIGRvbTAuCk9yIHlvdSBjb3VsZCBoYXZlIGEgbWVj aGFuaXNtIGZvciBwYXNzaW5nIG1vcmUgdGhhbiBvbmUgZG9tYWluIC8gaW5pdHJkCnRvIFhlbiwg YW5kIHBhc3MgWGVuIGJvdGggdGhlIG1lZGlhdG9yIHN0dWJkb20gYXMgd2VsbCBhcyB0aGUga2Vy bmVsIGZvcgpkb20wLgoKWzFdIHRqZC5waGxlZ2V0aG9uLm9yZy93b3Jkcy9zb3NwMTEteG9hci5w ZGYKCj4+IFRoZW4sIHdlIGNvdWxkIGFkZCBhIHNjaGVkX29wIGh5cGVyY2FsbCB0byBsZXQgdGhl IHNjaGVkdWxlcnMga25vdyB0aGF0Cj4+IGEgc3R1YmRvbSBpcyB0aWVkIHRvIGEgc3BlY2lmaWMg Z3Vlc3QgZG9tYWluLgo+IFdoYXQgaWYgb25lIHN0dWJkb20gc2VydmVzIG11bHRpcGxlIGRvbWFp bnM/IFRoaXMgaXMgVEVFIHVzZSBjYXNlLgoKVGhlbiB5b3UgZG9uJ3QgbWFrZSB0aGF0IGh5cGVy Y2FsbC4gOi0pICBJbiBhbnkgY2FzZSB5b3UgY2VydGFpbmx5IGNhbid0CnVzZSBhbiBFTDAgYXBw IGZvciB0aGF0LCBhdCBsZWFzdCB0aGUgd2F5IHdlJ3ZlIGJlZW4gZGVzY3JpYmluZyBpdC4KCiAt R2VvcmdlCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K WGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xp c3RzLnhlbi5vcmcveGVuLWRldmVsCg==